Bush chisel



Dec. 4 1923. 1,476,120

W. H. VAN SICKEL BUSH CHISEL Filed Sept. 50. 1920 L T] 2 If 7 .32

' m awro W/fl/EJJ: J j i S w 14 1/60 if: 20 c lt/aw I Al'fOlPf/EX Patented ec. 4, 1923.

wnuana H. VAN sIcKE'L, or LANGHORNE, PENNSYLVANIA, Assre-nor. To 'rnos. H. DAL- LET'I no, or PHILADELPHIA, rnnns'rnvnnra, A conronarron on new annsnv.

BUSH CHISEL.

.' Application filed September 30, 1920. Serial No. 413,707..

in bush chisels such as are used in connectionfwith stone dressing machines for facing stones.

The object of my invention is to provide a device of'this kind which is light in weight, strong and durable, and is so constructed that I am enabled to use cuts having plane faces, without centering or looking recesses, so that'the cuts used therein may be made by a blacksmith from standard shapes of tool steel, without shaping any portion thereof with the exception of the cutting faces of thecuts.

Fig. 1 of the drawings is a face view of one form of device made in accordance with my invention.

I Fig. 2 is a side elevation.

Fig. 3 is a sectional view on the line 3-3 of Fig. 2. I r 1 Fig. 4 is a perspective view of the gib for retalnmg the cuts in position in the head.

a disposed flanges In the drawings, the reference character 10 designates the head and 11 the stem, which is arranged to be inserted in the socket in the stonedressing machine. '12 and 13 are jaw members extending from the head} the inner faces of which. are parallel to each other and at right angles to the face of the head between the jaw members. The outer faces of the jaw members are provided with transverse undercutfrecesses near the lower ends thereof, andl i are U-shaped clamps, the legs 15. of which are seated in said recesses. 16 is a gib having oppositely 17 at opposite ends of the gib, the flanges at one side being arranged to engage the sides of the head, to retain the gib in position in flanges form retainers for the butt ends of the cuts 18; These cuts are seatedrwithin a socket formed of the under face of the gib 16, the inner sides of the jaws .12 and 13, the inner faces of the U-clamps 14, and two have invented a new the head, while other of the flanges 17 of gib 16, an d' are locked in position by a tapered key 19 seated in a key slot, in the inner face of the jaw member 12 v Y The cut holder is first machined from a suitable blank to the form shown in the Y drawings, the clamps 14 are shaped with the inner faces-of the legs normal totheb'ody of the clamp. The clamps are then heated, placed into position and; the legs bent in-:

wardly into the recesses, and when the clamps are cold they willbe under tension due to the contraction of metal. i V

In assembling, the gib 16 is, first positioned in the socket, the cuts are then inserted, and. secured in position by the key 19.

The gib 16 is arranged to protect the bot- I tom of the socket against the hammer blows ,of the cuts, and is preferably hardened to increase its resistance against the cutting ac-' tion of the butt ends of the cuts, The flanges thereon provide means for retaining the gib in position in the head aswell as positioning and aligning the butt ends of the cuts. As. the gib is readily removable, it can be replaced when worn by merely knocking out the key 19 to release the cuts. By the provisionof'clamps 14: at the ends of the jaw members, I am enabled to greatly reduce the weight of the cutholder and at the same time provide a more efficient device. As the clamps are placed-beyond the fastening key, the spreading action of the one or both of the clamps shouldbecome fractured, they canreadilybe-replacedby new clamps; 3

By the 'provlsion of these'clamps,

members and the head. .If forany reason" enabled to form the socket at a very low: cost, as the side walls. of the jaws including the key 'seatcan be machined by through cuts. The clamps not only form reinforces.

for preventing the spreading ofthe jaws,

form 'theend walls of, the socket, r and as the width of these clamps-is less but also than the depth of the jaws, I am'enabled to use a flanged abutment plate or'gib for the I r cuts. This flanged gib not only provides a readily renewable protecting plate forthe bottom of the socket, but also provides means for positioning the cuts, so that it is unnecessary to provide centering slots' or grooves in the cuts. This enables me to s 7 from the spirit and scope of my invention as defined in theappended claims.

7 Having now fully described my invention, what I claim and wish to protect by Letters Patent is a 1. A bush chisel having j awmembers for the reception of cuts, tension members shrunk in position on the jaw members connecting the jaws to each otherto prevent spreading of the outer ends thereof, and fixed V cooperative retaining means on the jaws and the tension members arranged toreadily permit the positioning of the tension members when expanded by heat and fixedly secure them in position when shrunk.

2. A bush chisel having jaw members for the reception of cuts, and a tension clamp on each side thereof having legs engaging both jaw members near the ends of the jaw members.

3. A bush chisel having jaw members for the reception of cuts, and a tension clamp on each side thereof having legs engaging both jaw members near the ends of the jaw members, the ends of said clamps engaging converging recesses in the jaw members.

4. A bushchisel having a head, a stem extending from said head, the head having jaw members with parallel inner faces,

there being transverse recesses in the outer faces of the jaw members on each side thereof, a tension clamp on each side of the jaw members, legs on each clamp seated in said recesses, the inner faces of the jaw members and the clamps forming a rectangular socket in the head for the reception of the cuts.

tension clamp on each side of the aw members having legs seated in said recesses, the inner faces of the jaw members and, the clamps forming a rectangular socket in the head cuts seated in said socket there hein a key seat formed in the inner face of one of the jaw members between the clamps and the inner end of the j aw member, and a key in said seat for securing the cuts in position in the socket.

6. A bush chisel having a head, jaws extending from the head, a til-shaped clamp on each side connecting the outer ends of lane seatin surfaces for the cuts on' the inner faces thereof, there being under cut transversely extending recesses in the outer face of each jaw member and near the ends thereof, U-shaped clamps under-tension connecting the ends of the jaw members to each other, the'legs of said clamps being seated in'said recesses, there being a transverse key slot in the inner face of one of thejaw members above the plane of the clamps, there being a cut receiving socket formed between the inner faces of the jaw members and the clamps a gib in the bottomof the socket, oppositelyextending flanges at opposite ends of said gib, one setofflanges engaging the sides of the head toretain the gib in position, cuts. in said socket abutting against the face of the gib, the other flanges on the gib being arranged to retain the cuts in position, and a key in the said key slot for locking the cuts in position.

In testimony of which invention, 1- have hereunto set my hand at Philadelphia, on this 27th day of Sbptember, 1920. i

v Ban n. VAN-sicker] 

